Device for swaging saw teeth



Aug. 29, w c TESCH 1,924,171

DEVICE FOR'SWAGING SAW TEETH Filed June 12 -2 14/35 TE5C]Z V Patented Aug. 29, i933 1 UNITED TATES (PATENT OFFICE i L 1 ,924,171

DEVICE Fort SWAGING 'sAw TEETIl" Walter C. Tesch, Milwaukee, Wis. s Q v 6 Application June12, 1931 Serial nogf sgasis dQlaims. (cilia-53 This invention relates to a new and useful device for swagingfsaw teeth. a

One of the objects of the present invention is the provision of a novel device for swaging saw teeth which is of a portable nature and adapted tobe manually or power operated for swaging the teeth of various types of saws and saws of various sizes. l 1 Another object of the present invention is the provision of a swaging device for "saw teeth wherein the saw is moved the distance between ,two teeth following each swaging operation, so that the teeth can, be consecutively swaged until all of the teeth on the saw have been finished.

1 A further object of the present invention, is the provision of a swaging device of the abOve character adapted to be manually controlled and is adjustable for various types of saws, as well as including means for automatically advancing the teeth'of the saw during the swaging operation,

and provided with adjustable means cooperating with the advancingmeans whereby to provide a positive engagement of the teeth with the advancing means, so that immediately following each swaging operationQthe saw will beadvanced equal to the distance between .the teeth. Another object of the present invention is the provision of a simple and inexpensivesaw swaging device which is mounted upon a base memher which carries adjustable means for clamping into position various sizes and types of saws, together with supporting means forfadjustably mounting the swaging mechanism upon the base. With the above and other objects in view, the invention consists in the novel features of construction, the combination and arrangement of parts hereinafter more fully setlforth, pointed out in the claims and shown in the accompanying drawing wherein: v

Figure 1 is a plan view of my swaging device; V

Figure 2 is a sectional view on the of Figure 1; Figure 3 is a detailed section on the of Figure 1. I l 7 Referring more particularly to the drawing, it will be noted that I have provided a substantially rectangular base member 1 having a latimproved Saw line 22 eral extension 2 projecting from one side thereof, and extending upwardly from the base at the inner end of the lateral extension is averticallydisposed flange 3 which forms a substantial anvil upon which the saw teeth are adapted' to rest. 65

tric-23 by means of the line a -3 tation of the eccentric.;

At one side of the anvil 3, I provide a pivot groove 6 adapted; to receive a'ten'o'n" 7 carried by thebase member lwhich is arcuatein shape as illustrated in Figure Lion-guiding the arm "5 in its adjustment and retaining the' same 7 against longitudinal movement;

Extending fromthe arm 5 is-a plate 8 provided with slots 91adapted to receive the adjusting bolts 1Q car: ried bythe base; whereby the arm 5 may be readily adjusted to various angles relative to the anvil and retained in such adjusted positions by means of the bolts 10; 1 Slidably mounted within'a central bore 11 in the arm 5 is a plunger 12 having a bifurcated outer end, as shown at 13 for engaging the saw teeth. The head 14 of the plungerlzpperates within a bore 15 and mounted upon the plunger and disposed between thevhead '14 andone end of the bore 15 is-a coil spring 16 normally re 1 taining the plunger in a retracted position- Slidabl-y mounted withinthe bore 15 is al'movable hammer 17 having an annular reduced.- per tion 18 forming an annular shoulder 19. It will be noted that the bore 15 opensfout through one side of the arm 5 and the shoulder 19 is arranged directly opposite thisopening. I A-removable cap 20 closes the outer end of the bore 15 and positioned between the closed end of the i cap and the outer end of the hammer 17,-. i s a coil spring 21 adapted to be placed'undertension when thel lammer 17 is moved outwardly in the bore,

i 'A vertioally disposed"shaft 22 'is carried by v the lateral plate Bat one side of the arm 5 and keyed to this shaft is an eccentric'23 rotatable within a collar 24. The collar 24 =-is retained against lateral movement relative to the eccenset screw 25, the inner 5 7 end of which travels within .an annular groove '26 formed in the face of the eccentric23; At-.

, tached atofthe collar 2 tis alateral finger member27-which is adapted to"engage the shoulder 19whe n the collar'24 is moved through thef'ro 10o Extending laterally from thecollar at one side of the shaf t is a lug'28 pivotally connected toa rockablearm 29.1 Thelother end, of rmfze is 3 bifurcated to form spaced ears-30 and arranged between these cars is amovable block 31" having an-arm 32 adjustably connected to the block 31; It,will ,be apparent from this-construction n ,that when theeccentric 23 is rotated, the collar 24;will n 1o,ve to the; right inFigure 1, so that 9 V the path of the plunger 12.

the shoulder 19 and disengages therefrom, the

tension of the spring 21 will .thro'wthe hammer 17 against the head 14 of'the plunger 12, caus ing this plunger to be forced outwardly. so that the biiurcated end l3'thereof--w ill engage the saw teeth aligned therewith.

Simultaneously, with the above action, the

7 arm 29 will be rocked upon itspivot and impart a reciprocating movement to the arm 32, whereby as soon asthe plunger 12 is retracted within its bore, the arm 32 is'moved inwardly to engage the next tooth in order for moving the same into Attention is directed'to the relative position of the arm 32 whereby when the arm 32 is moved inwardly toward the saw teeth, the" curved end 33 thereof will readily engage the tooth within its path. However, in swaging different types of saws, the length of the teeth vary con-.

siderably and in order to have the curved'end 33' adjustable for engaging teeth of difiere'nt lengthaan adjustable plate 34 is mounted upon the plate 8 and this carries an arm 35 arranged in the 'path of any lateral'movement on the part of the arm 32, whereby adjustment of the arm 3 5 will permit the curved end 33 of'arm 32 to movelaterally toward the saw, or to be 'moved away from the saw, so that it will be properly positioned for 'engagingthe teeth to move the saw a distance equal to the distance between the In order to retain the saw lagainst incidental movement while the teeth are being swaged, the clamping arm 36 is pivotally connected to one side of .armb an the lateral engaging end 37 thereoi extends paraIleIwith the upper face of the anvil 3, as shownfin Figure 1.

. I he arm'36 is retained n. its operative position above the anvil by means of the screw bolt 38. The arm 36 is pivotally mounted upon the bolt 36'1carriedby arm 5. V W At this time, I Wish to call attention to the fact that the outer endof'the shaft 22 is pro- .vided witha crank arm 39 carrying a handle 40 whereby movement may be readily imparted to e ec n ri fA s illustrated in the accompanying drawing, circular saws of different diameters may be readily placed in position for swaging the teeth thereof by supportingthem upon the transverse member 41 which carries an; uprightshait 42 provided at-its upper end with av variable cap' 43. This cap 43 is formed with afplurality 0foffset shoulders 44 of =diff'erent diameters for engaging within the central arbor'opening 0f .eachsaw bladeQ, a V I t e y g In F igure 2, it will be noted that the; second shoulder on the cap 43 is usedjor retaining the saw; a in position upon, the supporting member 41 and the cap 43 isretained againstmovement on the shaft. 42 by means of a'set screw 45.

Extending upwardly from the outer. end or the lateral me'mben2 is arr nge 46 'of substantially the same height asthe anvil flange 3 and arranged between the two flanges is a 'guide'rod one'endjof'the supporting member 41.

47adap'ted to be passedthrough an opening in,

' providedwith a threaded opening-to receive the adjusting screw 48 ari'anged' parallel with the guide--rod 47- and: mounted within: the,.-' flanges 3 and 46. ,Theouter end of the screw 48 is provided with a knurledthumb piece 49 whereby this screw may be quickly and easily manipulated by hand for adjusting the supporting member 41 on the guide rod e7 according, tothe diameter of the saw to be mounted thereon.

.Where it is desired to mount a cross out saw,"

or a similar type ofsaw other than the circular type, the guide m'embercan be moved in closer to the anvil flange 3 and a slightly different 7 type of' clamping mechanism canbe used for retaining the saw in position upon the supporting member. I

From the foregoing, it will be apparent that in the swaging operation, the finger 27 is actu- 1e against the tension of the coil spring 21,- while the tension of the coil spring 21- will urge the hammer. into engagement with the head 14 of 'V ated through the medium of the eccentric; 23

for imparting movement of 17 plungerl2 and immediately following this operation, the arm 32 is urged-inwardly for engaging:

arm 29 and engagingyone side of the block31;

7 Attention is also directed to the fact that the plate Band the arm 5 may be readily'adjusted according to the pitch of the teeth which are to be swaged through'the medium of ,the slots 9 and 10. '7

The plunger 12 is provided upon one side thereof with a substantially fiat face adapted-to be engaged with the fiat inner end of the set screw 12 to properly retain the bifurcated end 13 in position for engaging the'saw teeth and also retain'th'e plunger against rotationyso that when it is forced toward the saw teeth; the'bifurcated end will properly engage the teeth.

Another feature to which I wish tocall at tention is'the'fact that through adjustment of the'screw bolt 38, pressure is applied to the outer end of the clamping arm 36, so as to move the lateral 'end 3'7 thereof into engagement with the saw and securely: hold the sameagainst movement while being swaged.

1 It will be apparent from the accompanying drawing, together with the preceding description, thatI'have provided a very simple and inexpensive manually or power operated saw swaging device which can be easily transported from place to placeand' can be used for'swaging the teeth of saws of various sizes and'shapes.

from t pirit of the same or the scope of theappended claims.

I'claim: r v

1. A saw swaging device including a base, means for movably clamping a saw thereto, a movable plunger carried by the base forengaging the teeth of a saw, a movable hammer meme ber' having an annular shoulder, an eccentrically mounted collar having a lateral projecting finger for engaging said shoulder to impart movementto the hammer in one direction, a coil spring engaged by the hammer when the same is movedin one direction whereby-the coil'spring is compressedso that thetension of said spring will-urge the hammer toward the plunger upon disengagement of the finger from the shoulder, means for manually actuating the collar and means operated in conjunction with the hammer for engaging the saw teeth to advance the saw past the plunger afteroperation of said plunger;

carried by the movable arm and adapted to en-,

gage the saw teeth for holding the same stationary during operation of the hammer.

3. 'A saw swaging device including a base having a lateral extension, a flange extending upwardly at the inner end of the extension to form an anvil, means 'adjustably mounted upon the extension for clamping a saw in position so that the teeth thereof are movable over the anvil,

1a pivotally mounted arm adjustable over the base, a plunger carried by the arm for engage-v ment. with the saw teeth, means for urging the plunger into engagement with thej'saw teeth, and

means operating in conjunction with theplunger for advancing the teeth in front ofthe plunger after the actuation of the plunger on theteeth.

4. A saw swaging device comprising a base, a a

saw support on the base, means rotatably mounting a circular saw on the support, a guide sleeve pivotally connected to the base atone side of the saw support, a, swaging plunger slidable in the guide, a light tension spring normally urging the plunger away from the saw, a hammer slid ably mounted in the guide, a heavy coil spring normally urging the hammer toward the plunger, means for releasably engaging the plunger to 'move the same rearward against the tension rounding the same, and means operated from of the heavy coil spring, said means including a rotatable eccentric and an eccentric collar surthe eccentric collar for advancingthe'saw past the plunger after the tripping of the hammer;

' WALTER C. TESCH. 

